1/( )+1/( )+1/( )+1/( )+1/( )+1/( )+1/( )+1/( )=1
第1个回答 2009-08-06
1/(2 )+1/(3 )+1/(12 )+1/(24 )+1/( 48)+1/(72 )+1/(216 )+1/(432 )=1
第2个回答 2009-08-06
1/(2 )+1/(3 )+1/(12 )+1/(24 )+1/( 48)+1/(72 )+1/(216 )+1/(432 )=1 它是分数加法
第3个回答 2009-08-06
1/2+ 1/6+ 1/8+ 1/12+ 1/20+ 1/30+ 1/42+ 1/56 =1
原理:
1-1/2 + 1/2-1/3 +1/3-1/4 +1/4-1/5+ 1/5-1/6 +1/6-1/7 +1/7-1/8 +1/8=1
原理:
1-1/2 + 1/2-1/3 +1/3-1/4 +1/4-1/5+ 1/5-1/6 +1/6-1/7 +1/7-1/8 +1/8=1
第4个回答 2009-08-06
1/(2 )+1/(3 )+1/(12 )+1/(24 )+1/( 48)+1/(72 )+1/(216 )+1/(432 )=1